Cab coupling



(Nb Model.) 3 Sheets-Sheet 1. E P. EASTWIOK, J1,

. OAR COUPLING. No. 414,899. Patented Nov. 12, 1889.,

l ir' *4 i -l L L I WITNESES: INVENTOR- ATTORNEYS.

N. PETERS. Phnlo-Uflhogruphen Wishinghm, n. c

(No Model.) 8 SheetsSheet 2.

E. P. EASTWIOK, Jr. GAR GOUPLING.

No. 414,899. v Patented Nov 12, 1889.

' w/r/v 8E8: V v INVENTOH:

ATTORNEYS.

3 Sheets-Sheet 3.

(No Model.)

B. P. EASTWIOK', Jr

UAR GOUPLING..

Patented Nov. 12, 1889.

INVENTOR:

WITNESSES:

A TTORIVE Y S.

U IT D STATES PATENT OFFICE.

EDWARD P. EASTVVICK, JR., OF NEW YORK, N. Y., ASSIGNOR TO FREDERICK ROBERT, OF SAME PLACE.

CAR-COUPLING.-

SPECIFICATION forming part of Letters Patent No. 414,899, dated November 12, 1 889.

= Application filed April 27, 1889. Serial No. 308,778. (No modal.)v

To all whom it may concern.- I

Be it known that I, EDWARD P. EASTWIOK, J12, of the city, county, and State of New York, have invented a new and useful Improvement in Car-Couplers, of which the following is a full, clear, and exact description.

My invention relates to an improvement in car-couplers of the vertical-plane hook type, and has for its object to provide a means whereby the bearing-surface of the revoluble knuckle is made much greater than is usual in couplersof this type, thus greatly increas-. ing its durability.

A further object of the invention is to provide a means whereby the strain on the drawhead caused by a buffing blow is greatly reduced and taken up on the pin, which at the same time answers for alocking-pin.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan View of the draw-head. Fig. 2 is a sideelevation of tllej same. Fig. 3 v is asection on line 00 a: of Fig. 1, and also 0 through the knuckle. Fig. 4 is a perspective View of the knuckle, and Fig. 5 is a plan view of two draw-heads providedwith myimprovement and in position for coupling. In carrying out the invention the draw- 3 5 head 10 is provided with a horn 11 at one side, .a concaved front face, an interior chamber 12, and an opening 13 at top and bottom, 10- cated preferably in the center, to receive an ordinary pin when the old style of link is used. The side of the draw-head opposite to that carrying the horn is recessed, as shown at A in Fig. 2,the top and bottom walls of the recess being stepped to provide shoulders 14:. At this recessed side of the draw-head in the top and bottom a second pin-opening 15 is formed, which openings are preferably essentially rectangularin general contour, as shown in Fig. 1. The pin-openings 15, which are the ones employed in connection with my improvement, are adapted to receive a pin 16,

illustrated in Fig. 3 rectangular or polygonal in cross -seotion, and having a recess 17 formed in one side near the lower end.

Between the frontface of the pin apertures or openings 15 and the opposed front face of 5 the draw-head a circular channel 18 is produced in the upper and lower walls of the chamber 12,as shown in Figs. 1 and 3.

The arcs of the channels 18 are described from a center without the draw-head, as at point a in Fig. 1, for instance, or at any point between a center line drawn longitudinally through the draw-head and the outer end of the channeled side of the same, whereby the channels, commencing at the curved face of the draw-head near the end, stop at or near the center pin-opening 13, in advance thereof. Thus the concavity of the channels face in direction of the front of the draw-head.

The knuckle employed in connection with the draw-head above described comprises two portions or sections which are formed integral-namely, a shank B, adapted to revolve in the draw head, and coupling-hooks B, which latter are practically constructed in the ordinary manner. The general shape of the knuckle is semicircular, and two spaced hooks are employed, apertured to receive an ordinary pin. The upper face of the upper hook and the under face of the lower hook are longitudinally recessed to provide an inher and'jo'uter rib 19 and 20, the upper and lower inner ribs 19 being adapted to enter and fit closely'in the channels 18 of the drawhead. I

The ribs 19 do not extend to the inner end of the shank B, being stopped near said end to form a horizontal surface 21 and vertical shoulder 22 at the end of the said rib 19. In the upper face a recess D is made, providing a horizontal surface 23 below the plane of the body of the rib and a vertical shoulder 24, as shown in Fig. 4.

The inner ribs 20 terminate at the union of the hooks with the shank. In the outer con- 5 width to neatly fit in the slot or recess 17 in said coupling-pin. The shoulder 22 is formed upon the ribs to facilitate entering the knuckle in the channel of the draw-head. Thus as the outer walls of the channel-ways at b are cut away, as shown in Fig. 2, to enter the knuckle, the nose of the hooks is made to approach the front central face of the draw-head, and the reduced or shouldered portion 22 of the rib of the knuckle is slid under the recessed portion b of the head, and is thereby allowed to enter the channel, and when so entered the knuckle may be readily carried backward. If the ribs of the knuckle and the wall of the channel were not cut away in this manner, it would beimpossible for the knuckle to enter the draw-head, as the nose of the hook-section would otherwise strike against the face of the draw-head before the rear end of the ribs could be brought in proper position to enter the channel-ways.

It will be understood that in practice the position of the ribs and channel-Ways may be reversed without departing from the spirit of the invention that is, the channel maybe located in the knuckle and the ribs formed upon the top and bottom walls of the draw-head chamber.

The position of the center of revolution of the knuckle is so taken that its distance from the line of draft with reference to the distance from the bearing-point of the knuckle is very slight, thereby diminishing to a minimum the strain upon the locking-pin, and it will also be noticed that by reason of this and the construction of the knuckle a buftingblow will cause but a very slight strain upon the coupling-pin.

In operation, when the knuckle is in the coupled position illustrated in Fig. 3, the pin 16 enters and passes down through the pinslot 27 in the knuckle. Thus the pin, being bound by the walls of the said slot, must sustain all the buffing strain. To uncouple,

the pin is raised until the upper and lower walls of its recess 17 are capable of bearing against the horizontal bearing-surface 26 of the knuckle, when, by reason of the opposed knuckle drawing away from the movable knuckle, the latter is pushed rearward or inward, in which event that portion of the knuckle between the surfaces 26 slides through the pin slot or recess 17.

The coupling is automatic since, as the horn of the opposed draw-head strikes the convex surface of the revoluble knuckle at or near the union of the hooks with the shank, the contact moves the engaged knuckle outward from the head, and as the pin-slot therein registers with the pin the latter falls down, locking the knuckle in the coupled position. When the pin is in this position, as heretofore stated, it is evident that it must sustain all the buffing shock.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a car-coupler, aknuckle provided with an upper and lower stepped are-shaped rib, substantially as shown and described.

2. In a car-coupler, a pin of hexagonal section, two faces of which are coincident with the radial lines from a common center, substantially as herein shown and described.

3. In a car-coupler, a draw-head provided with areed channels convex with reference to a center line drawn through the head and having a recess in the channeled side, the top and bottom walls of which are stepped, substantially as shown and described.

4. In a car-coupler, a knuckle provided with an upper and lower stepped arc-shaped rib, a pin-recess in one side face, and an upper and lower longitudinal bearing-surfaee between the pin-recess and the coupling-nose, substantially as shown and described.

5. In a ear-coupler, the eombination,with a draw-head provid ed with arc-shaped channels convex with reference to a center line of the head, and a recess A in the channeled side, of a knuckle provided with an upper and lower stepped arc-shaped rib, a pin-recess in the outer face, and an upper and lower longitudinal bearing surface between the pin-recess and the coupling-nose of the knuckle, and a coupling-pin passing through the draw-head and recess in the knuckle, substantially as specified.

, EDW. P. EASTWICK, JR. Witnesses:

GUSTAVO ALFONSO, EDW. P. EASTWICK. 

